The incidence of cervical cancer among women who marry (have sex) before the age of 20 is 1.58 per cent, and among women who marry (have sex) after the age of 21, the incidence of cervical cancer drops to 0.37 per cent, a fourfold difference. It was observed more than 140 years ago that the incidence of cervical cancer among nuns in convents was considerably lower than among married women. This is another indication of the relationship between cervical cancer and sexuality. It is found that the cervical cancer suffered by young girls is closely related to sexual impurity, and the younger the age of sexual life, the more sexual partners, the more frequent the lovemaking, the higher the incidence rate. The reasons are as follows: 1. The cervical tissue cells of young girls are not yet mature, relatively tender and weak, sensitive to external carcinogenic and cancer-promoting substances. If the sexual partner is a carrier of cancer cells, it is easy to plant the cancer cells in the cervical tissues of young girls who are not yet mature through sex. 2. In recent years, research has found that the incidence of cervical cancer is related to herpes 2 virus infection. Through the sexual sub-infection and cervical cancer; 3, male circumcision in a variety of pathogenic bacteria, viruses (especially to warts of human papillomavirus) prematurely too much repeatedly stimulate young women’s lower genital tract and cervical epithelium, resulting in chronic cervicitis, and ultimately transformed into cervical cancer. Tips: Therefore, to prevent cervical cancer from occurring at the source, female friends need to be clean and avoid being violated by viruses and other substances on the cervix.